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COMMON-MODE INSENSITIVE CURRENT-SENSING TOPOLOGY IN FULL-BRIDGE DRIVER WITH HIGH-SIDE AND LOW-SIDE ENERGY MATCHING CALIBRATION
COMMON-MODE INSENSITIVE CURRENT-SENSING TOPOLOGY IN FULL-BRIDGE DRIVER WITH HIGH-SIDE AND LOW-SIDE ENERGY MATCHING CALIBRATION
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机译:具有高侧和低侧能量匹配校准的全桥驱动器中的共模质疑电流传感拓扑
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摘要
A system may include a Class-D stage comprising a first high-side switch coupled between a supply voltage and a first output terminal of the Class-D stage, a second high-side switch coupled between the supply voltage and a second output terminal of the Class-D stage, a first low-side switch coupled between a ground voltage and the first output terminal, and a second low-side switch coupled between the ground voltage and the second output terminal. The system may also include current sensing circuitry comprising a first sense resistor coupled between the first low-side switch and the ground voltage, such that an output current through a load coupled between the first output terminal and the second output terminal causes a first sense voltage proportional to the output current across the first sense resistor when the first low-side switch is activated. The current sensing circuitry may also include a second sense resistor coupled between the second low-side switch and the ground voltage, such that an output current through the load causes a second sense voltage proportional to the output current across the second sense resistor when the second low-side switch is activated. The system may also include measurement circuitry configured to measure the first sense voltage and the second sense voltage to determine the output current.
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